package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;



    @Override
    public void deleteCategory(Long id) {
        //根据id查询该分类下是否有菜品,如果有,就不删除,如果没有就删除
        LambdaQueryWrapper<Dish> dishWrapper = new LambdaQueryWrapper<>();
        dishWrapper.eq(Dish::getCategoryId, id);
        Integer disCount = dishMapper.selectCount(dishWrapper);

        if (disCount > 0) {
            throw new CustomException("该分类下有菜品信息,不能删除");
        }

        //根据ID查询该套餐下是否有菜品,如果有,就不删除,如果没有就删除
        LambdaQueryWrapper<Setmeal> setmealWrapper = new LambdaQueryWrapper<>();
        setmealWrapper.eq(Setmeal::getCategoryId, id);
        Integer setmealCount = setmealMapper.selectCount(setmealWrapper);

        if (setmealCount > 0) {
            throw new CustomException("该分类下有套餐信息,不能删除");
        }

        this.removeById(id);


    }
}
